Some of that around the edge of the lawn always gets worse it seems this time of year. The front wheel lays it over and if you have a little indention or rut it gets real bad. If your really wasting time trying to stand it up and trim it, I found that my walkbehind and bagger works well for picking it up and cutting it on my particular customers. In fact don't be afraid to drop it a little shorter around the edge if needed. Nobody ever has complained when I've done this. I never had any luck with my SuperZ but i had the XR7 deck and it left strips between the center and left side blade, if not both sides. My Exmark decks were better here. I'm a little surprised the X factor is not picking it up better. My Outlaw had some cut quality issues until I bought some very cheap Scag hi lifts wow what a difference it made in the 2010 deck. Have you tried double blades at all to create more lift, sucks more gas but might speed things up and help with the cut. Always make sure your deck is very clean as well as this effects the air flow.